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GeForce GTX 480 vs Radeon HD 6950 2GB

Intro

The GeForce GTX 480 makes use of a 40 nm design. nVidia has clocked the core speed at 700 MHz. The GDDR5 RAM runs at a frequency of 924 MHz on this particular card. It features 480 SPUs as well as 60 Texture Address Units and 48 ROPs.

Compare those specs to the Radeon HD 6950 2GB, which has a core clock frequency of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 256-bit memory bus, and makes use of a 40 nm design. It is made up of 1408 SPUs, 88 TAUs, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6950 2GB 200 Watts
GeForce GTX 480 250 Watts
Difference: 50 Watts (25%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 480 should in theory be a small bit superior to the Radeon HD 6950 2GB overall. (explain)

GeForce GTX 480 177408 MB/sec
Radeon HD 6950 2GB 160000 MB/sec
Difference: 17408 (11%)

Texel Rate

The Radeon HD 6950 2GB is quite a bit (about 68%) better at AF than the GeForce GTX 480. (explain)

Radeon HD 6950 2GB 70400 Mtexels/sec
GeForce GTX 480 42000 Mtexels/sec
Difference: 28400 (68%)

Pixel Rate

The GeForce GTX 480 should be a lot (approximately 31%) better at anti-aliasing than the Radeon HD 6950 2GB, and also will be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 480 33600 Mpixels/sec
Radeon HD 6950 2GB 25600 Mpixels/sec
Difference: 8000 (31%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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GeForce GTX 480

Amazon.com

Check prices at:

Radeon HD 6950 2GB

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce GTX 480 Radeon HD 6950 2GB
Manufacturer nVidia AMD
Year March 2010 December 2010
Code Name GF100 Cayman Pro
Memory 1536 MB 2048 MB
Core Speed 700 MHz 800 MHz
Memory Speed 3696 MHz 5000 MHz
Power (Max TDP) 250 watts 200 watts
Bandwidth 177408 MB/sec 160000 MB/sec
Texel Rate 42000 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 33600 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 480 1408
Texture Mapping Units 60 88
Render Output Units 48 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 3000 million 2640 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 480

Amazon.com

Check prices at:

Radeon HD 6950 2GB

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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